//
//  NSString+IPString.m
//  Joynet
//
//  Created by admin on 2017/7/27.
//  Copyright © 2017年 admin. All rights reserved.
//

#import "NSString+IPString.h"
#import <ifaddrs.h> 
#import <arpa/inet.h> 
#import <net/if.h>
#define IOS_CELLULAR    @"pdp_ip0" 
#define IOS_WIFI        @"en0" 
#define IOS_VPN         @"utun0" 
#define IP_ADDR_IPv4    @"ipv4" 
#define IP_ADDR_IPv6    @"ipv6"

@implementation NSString (IPString)
+ (NSString *)getOutsideIPAddress
{
    NSURL *ipURL = [NSURL URLWithString:@"http://ip.taobao.com/service/getIpInfo.php?ip=myip"];
    NSData *data = [NSData dataWithContentsOfURL:ipURL];
    NSDictionary *ipDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    
    NSString *ipStr = nil;
    if (ipDic && [ipDic[@"code"] integerValue] == 0) { //获取成功
        ipStr = ipDic[@"data"][@"ip"];
    }
    return (ipStr ? ipStr : @"");
}
#pragma mark - 获取设备当前网络IP地址 
+ (NSString *)getIPAddress:(BOOL)preferIPv4 {
    NSArray *searchArray = preferIPv4 ?
  @[ IOS_VPN @"/" IP_ADDR_IPv4, IOS_VPN @"/" IP_ADDR_IPv6, IOS_WIFI @"/" IP_ADDR_IPv4, IOS_WIFI @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6 ] :
  @[ IOS_VPN @"/" IP_ADDR_IPv6, IOS_VPN @"/" IP_ADDR_IPv4, IOS_WIFI @"/" IP_ADDR_IPv6, IOS_WIFI @"/" IP_ADDR_IPv4, IOS_CELLULAR @"/" IP_ADDR_IPv6, IOS_CELLULAR @"/" IP_ADDR_IPv4 ] ;
    NSDictionary *addresses = [self getIPAddresses];
    NSLog(@"addresses: %@", addresses);
    __block NSString *address; [searchArray enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop) {
        address = addresses[key];
        //筛选出IP地址格式
        if([self isValidatIP:address]) *stop = YES;
    } ];
    return address ? address : @"0.0.0.0";
}
+ (NSDictionary *)getIPAddresses {
    NSMutableDictionary *addresses = [NSMutableDictionary dictionaryWithCapacity:8];
    // retrieve the current interfaces - returns 0 on success
    struct ifaddrs *interfaces; if(!getifaddrs(&interfaces)) {
        // Loop through linked list of interfaces
        struct ifaddrs *interface;
        for(interface=interfaces; interface; interface=interface->ifa_next)
        {
            if(!(interface->ifa_flags & IFF_UP) /* || (interface->ifa_flags & IFF_LOOPBACK) */ )
            { continue;
                // deeply nested code harder to read
            } const struct sockaddr_in *addr = (const struct sockaddr_in*)interface->ifa_addr;
            char addrBuf[ MAX(INET_ADDRSTRLEN, INET6_ADDRSTRLEN) ];
            if(addr && (addr->sin_family==AF_INET || addr->sin_family==AF_INET6)) {
                NSString *name = [NSString stringWithUTF8String:interface->ifa_name]; NSString *type; if(addr->sin_family == AF_INET)
                { if(inet_ntop(AF_INET, &addr->sin_addr, addrBuf, INET_ADDRSTRLEN))
                {
                    type = IP_ADDR_IPv4;
                }
                } else {
                    const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6*)interface->ifa_addr;
                    if(inet_ntop(AF_INET6, &addr6->sin6_addr, addrBuf, INET6_ADDRSTRLEN))
                    {
                        type = IP_ADDR_IPv6;
                    }
                }
                if(type)
                { NSString *key = [NSString stringWithFormat:@"%@/%@", name, type];
                    addresses[key] = [NSString stringWithUTF8String:addrBuf];
                }
            }
        } // Free memory
        freeifaddrs(interfaces);
    }
    return [addresses count] ? addresses : nil;
}
+ (BOOL)isValidatIP:(NSString *)ipAddress {
    if (ipAddress.length == 0)
    {
        return NO;
    }
    NSString *urlRegEx = @"^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." "([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
    NSError *error;
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:urlRegEx options:0 error:&error];
    if (regex != nil) { NSTextCheckingResult *firstMatch=[regex firstMatchInString:ipAddress options:0 range:NSMakeRange(0, [ipAddress length])];
        if (firstMatch) {
            NSRange resultRange = [firstMatch rangeAtIndex:0]; NSString *result=[ipAddress substringWithRange:resultRange];
    //输出结果
    NSLog(@"%@",result);
    return YES;
  }
  }
    return NO;
}
    
  
   

    

@end
